EA888 Gen 3 - A4 / Allroad / GTI?

[Evil Morty]

I am trying to understand where the EA888 is the same and different between Audi and VW. Obvious - longitudinal vs transverse. But what else?

I have a b9 allroad. I've read a ton of threads, call several tuners, and most of my research indicates that Audis seem to be a bit more prone to issues when tuned. Granted, there seems to be more tuning / posting in the mk7 world so could have some bias.

GTIs and Golf Rs have tunes all day and rarely have catastrophic failure (turbo failure on early models - check. I had mk7 gti and a mk7 r and spent a tom of time on those forums). What is the difference between these engines between Audi/vw?

I could be wrong. But people seem to be indicating the b9 ea888 is less safe to tune than the mk7 ea888.

Thoughts?

[Smac770]

Audi EA888

Gen0:
1.8T transverse BYT engine used briefly in early 2007

Gen1:
1.8T transverse BZB engine used mid '07-mid '08
2.0T transverse CCTA/CBFA engines used in the Mk2 A3/TT
1.8T longitudinal CABA/CABB engines used in the A4 (but not in the US)

Gen2:
1.8T transverse CDAA engine used mid '08-
2.0T transverse CCZA/CCXA engines used in the Mk2 S3/TTS?
1.8T longitudinal CDHA/CDHB engines used in the A4 (but not in the US)
2.0T longitudinal ...

So that last one is the varied family used in the US B8 A4 products. CDNB/CDNC in EU, CAEB in the US for gas versions / CFKA in the EU, CPMA in the US for flex fuel versions. The 2.0T longitudinal was different from the rest of Gen1/Gen2 in that it had the Audi Valvelift System, on the exhaust cam.

For the gens up to this point, the parts bins were 06H for EA888 longitudinal and 06J for EA888 transverse.

At the end of 2012, the Gen3 was released.

Gen3:
1.8T transverse CJSx engines
2.0T transverse CJXC engine
1.8T longitudinal CJEB engine
2.0T longitudinal CNCB/CNCD engines used in the B8.5 A4, but only in specific markets, not in the US

For Gen3, the parts bins were 06K for transverse and 06L for longitudinal. The Gen3 is when the move to the ISxx turbos occurred.

And we see that last point. Not in the US version of the B8.5 A4. No, we got carried on with the same Gen2 that had been a royal pita in the B8.0 so far. As we didn't get the much nicer Gen3, they tossed us a cookie of a hp bump for MY14, the CAED/CPMB engines (the first three letters designate an engine, the last letter is just the output/applicaiton variant - e.g., the 3.0T CTUA in the A6/A7, CTUB in the S4/S5/A8, CTUC in the Q5, and CTUD in the SQ5).

My friend with a 2014 or 2015 Passat (Wolfsburg?) had a 1.8T Gen3 engine, while an A4 from that model year would have had a CAED or CPMB 2.0T Gen2 engine.

Gen3 evo / Gen3 b-cycle:

So come B9 release. At this time, Audi/VW/whoever had updated the Gen3 to Gen3 evo, minor changes, mostly the same; engine code CYMC in the US. And they dropped the 1.8T in favor of the new b-cycle 2.0T. This is that "ultra" engine, the sub 200hp one, engine code DPBA. Being still Gen3 engines, parts bins are still 06K and 06L.

Gen4 evo / Gen4 b-cycle:

With MY21, the US B9s are now using "mild hybrid" variants of the engines. Make no mistake, this is purely for efficiency purposes, not performance purposes. Still, with the electric BAS attached, Audi claims +13hp. 261hp for Gen4 evo DPAA and 201hp for Gen4 b-cycle DMSA. As these are a new Gen, they are also using a new parts bin, 06N for the longitudinal. I don't know if there is a transverse Gen4.


So that's the lineup on the Audi side. Gen2 2.0T CAEx/CPMx in the B8; Gen3 evo and b-cycle in the B9, until MY21 with the roll to Gen4 mild hybrid.

Your Mk7 I believe used the original Gen3 engines, like my buddy's Passat. The engine we never saw here in the US in the B8.5. I presume the A3/TT Mk3 clones used the same as VW. But I don't really make note of the transverse stuff; it's too much mish mash and not relevant to my longitudinal world.

As for "safe", no idea. I can't imagine anyone is bothering to tune the b-cycle engine. So I think your question boils down to "is there any problems/limits with tuning a CYMC". To which I have no answer. APR has a stage 1 for CYMC, https://www.goapr.com/products/softw...EA888-3-L-IS20

[Evil Morty]

Wow. That is a lot of really great information. Thank you for taking the time to share that!

[21A4quattro]

Thanks for all of the info, @Smac770!

Why won't Audi publish all of this?

[Smac770]

They kind of do. I only know what I read from Audi's SSP (self-study program) documents, which you can find on the Internet through searching. You can officially access them through erwin (erwin.audiusa.com), but I don't maintain a subscription to that. google search "audi ssp xxx" when you know the specific xxx number, or just search "audi ssp whatever-topic" and see what comes up. My post above probably integrates the information from a dozen different SSPs as well as other information learned from just dealing with the subject for several years now.